Does the inside of our computer look just like this?
The problem is that your graphics card sits right under the exhaust from your CPU. You could possibly rig up a fan or something to try to push air to your card but that's going to get you a lot as it will be getting the hot air from the CPU cooler. A potential answer would be in making a hole in the side panel of your case to get fresh air in to your card, maybe with a duct to direct the outside air to your card.
Did you remove your card and clean it out with compressed air? That would be the best thing you could do for it. A second would be to replace the thermal paste currently between the GPU and cooler with some new (TX2 is about the best out there). This should hopefully drop your temps be a few degrees and allow you to better blow out the cooler.
Here's what someone did with theirs:
He removed the shroud from around the CPU cooler and fastened a fan to the cooler itself. I would go one beyond that and mount another fan to the front of the cooler and use then as push/pull.
He also replaced the card's cooler with one of these:
Newegg.com - ZALMAN VF1000 2 Ball VGA Cooler